CUSIP 84833T103COMSPROQ4 2025
31 filings · latest Aug 14, 2025
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Gsk PLC | 9.19M | $21.41M |
| 2 | Pfizer Inc | 2.36M | $5.50M |
| 3 | Vanguard Group Inc | 2.08M | $4.85M |
| 4 | Renaissance Technologies LLC | 1.28M | $2.98M |
| 5 | Alphabet Inc. | 890.0K | $2.07M |
| 6 | Anson Funds Management LP | 625.1K | $1.46M |
| 7 | Geode Capital Management, LLC | 529.2K | $1.23M |
| 8 | Blackrock, Inc. | 433.6K | $1.01M |
| 9 | Citadel Advisors LLC |
| 4 | Feb 14, 2024 | Anson Funds Management LP | 13G | 8.1% | 4.30M | SEC |
| 5 | Feb 14, 2023 | Aquilo Capital Management, LLC | 13G/A | — | — | SEC |
| 6 | Feb 14, 2023 | Biotechnology Value Fund L P | 13G/A | — | — | SEC |
| 7 | Jan 20, 2023 | Gsk PLC | 13D/A | 17.8% | 9.19M | SEC |
| 8 | Nov 14, 2022 | Gsk PLC | 13D/A | 20.0% | 9.19M | SEC |
| 9 | Oct 3, 2022 | Aquilo Capital Management, LLC | 13G/A | 3.6% | 1.24M | SEC |
| 10 | Jul 8, 2022 | Blackrock Inc. | 13G | 2.1% | 690.8K | SEC |
See the full Schedule 13D/13G history for Spero Therapeutics Inc.
Unlock full history| 397.9K |
| $927.0K |
| 10 | Two Sigma Investments, LP | 372.6K | $868.1K |